Int 14 Fn 20 - Alloy Mw386 - Attach Logical Communications Port To Physi [S] AH = 20h AL = logical port (01h COM1, 02h COM2) DX = physical port number Return: AX = status 0000h successful FFFFh failed See Also: AH=21h"Alloy",AH=22h"Alloy",AH=23h"Alloy",INT 17/AH=8Bh"Alloy"